The currency used in Guam is called as the . This currency is denoted with the currency sign and the ISO 4217 Code for the is .
The , is the official currency of the Guam . It is divided into 100 smaller units called .

The constitution of Guam provides that the Guam government shall have the power to print the and coins to be used as a legal tender in Guam.
The bank notes and coins are both designated as "legal tender" in payment of debts.

The bill uses the decimal system, consisting of 100 equal units.

The symbol , usually written before the numerical amount, is used for the .

Currently printed bank notes denominations are
and the coins are minted in the denominations of .

Financial analysts regularly cite the balance of trade and investment in Guam as the most important influence on the value of the .
The difference between what the Guam exports and imports in terms of goods and services to and from other countries can be obtained from a balance of trade statement.

The balance of investment on the other hand represents the difference in exports and imports of capital. If exports from exceed imports from other countries, in either the balance of trade or balance of investments, it is called a surplus.
The term deficit is used when the imports into exceed exports to other countries. The points below go into detail to explain on how the balance of trade and balance of investments affect the .

Balance of trade: Also referred to as the current account balance, the trade balance is equal to the difference between imports to Guam and exports from the Guam.
For example, when the Guam has been running a trade deficit with the rest of the world and growing by the day, the trade deficit is making foreign investors increasingly nervous and will make the foreign investors to part ways with .
This will lower the value of the significantly.

Falling prices on foreign goods: When the prices of imported foreign goods decrease, they become more attractive to consumers, creating a larger trade deficit. On the other hand, a rise in the prices of foreign goods and services, through natural price inflation or because of increased demand, can make goods and services look more attractive to the local consumers and help to narrow the trade deficit of Guam.
This gives boast to local Guam industry and the economy. Hence the value of the rises in foreign currency exchange.

Balance of investment: When the Guam imports more than it exports, it means investors from other countries have to buy Guam assets to keep the from falling.
To explain easily, if the Guam exports less than it imports, there is a pressure on foreign investors to buy denominated assets such as bonds or treasury securities in order to offset the difference.